hdiutil changes have broken mounting for some DMGs

[rolandwalker]

Example: teamspeak-client.rb cannot get past the license.

The assumption is that one of these is responsible:
#4892, #4887, #4889, #4900, #4975, #4978, #4857, #5063

[rolandwalker]

@NathanielMichael I haven't patched this Cask, because I wasn't sure whether the problem was limited to my machine. Can you duplicate that the second command below gives an error?

$ brew cask fetch teamspeak-client
$ echo y | hdiutil attach /Library/Caches/Homebrew/teamspeak-client-3.0.15.dmg >/dev/null || echo error

[NathanielMichael]

@rolandwalker Seg fault. Interesting.

nate at Pu in ~
$ brew cask fetch teamspeak-client
==> Fetching resources for Cask teamspeak-client
==> Downloading http://dl.4players.de/ts/releases/3.0.15/TeamSpeak3-Client-macosx-3.0.15.dmg
Already downloaded: /Library/Caches/Homebrew/teamspeak-client-3.0.15.dmg
==> Success! Downloaded to -> /Library/Caches/Homebrew/teamspeak-client-3.0.15.dmg

nate at Pu in ~
$ echo y | hdiutil attach /Library/Caches/Homebrew/teamspeak-client-3.0.15.dmg >/dev/null || echo error
Segmentation fault: 11
error

[rolandwalker]

Thanks! I'll downgrade this Cask to 3.0.14.